Speedo problem

[frank5079]

I've tried the search feature to no avail; I have an 01 Maxima SE automatic and the speedo reads half of the actual speed. I have replaced the vss behind the left tire and still have the same problem. Is the speedo in the instrument cluster the culprit?

[ezb57e]

Why did you replace one of the VSS's?
Are there any DTC's in any system?
Sounds like a processing problem in the Unified Control Meter.

[frank5079]

Why did you replace one of the VSS's?
Are there any DTC's in any system?
Sounds like a processing problem in the Unified Control Meter.

So, does that mean that I have to replace the instrument cluster then??

[ezb57e]

Maybe. What made you replace a VSS?
Are there any DTC in any system of the car?

[frank5079]

A few months back with the cruise control on I hit a big bump on the road that was pretty jarring, enough to knock the cruise control off and cause the cruise control set light to blink. Then I started having this speedo problem, so I figured that my vss was on the fritz.

[ezb57e]

Is the cruise control working OK now, but the speedo reads wrong?
Does your car have traction control?
If you haven't, do the meter check on EL-117 here:
http://www.nicoclub.com/FSM/Maxima/2001/EL.pdf
If you have Traction Control the system uses the VSS on the trans, not the ones at the wheels.

[frank5079]

Is the cruise control working OK now, but the speedo reads wrong?
Does your car have traction control?
If you haven't, do the meter check on EL-117 here:
http://www.nicoclub.com/FSM/Maxima/2001/EL.pdf
If you have Traction Control the system uses the VSS on the trans, not the ones at the wheels.

Is the cruise control working OK now, but the speedo reads wrong?
yes.

Does your car have traction control?
no.

I will try to do the meter check today...

[frank5079]

Sorry for the delay guys but my speedo is now working!!! Turns out my car does not have a revolution sensor. The spot on the trans where the rev sensor would normally go was blocked off. As it turns out our master tech here at Infiniti was right after all, and that my problem with the speedo is that it gets its signal from both front anti-skid ABS sensors. So after replacing them both my speedo now works!!!